Hi, Maker governance participant here. Currently the rate to borrow Dai against UNI is 3%. The current lending rate for Dai on Compound is 6.83%, so there is a simple arbitrage there, however, Compound rates fluctuate rapidly so that is one risk.
Alternatively, Uniswap governance could borrow Dai using some part of its treasury and use some part of the remainder to provide liquidity on the UNI/DAI pair without having to sell UNI for stablecoins. The Dai could be swapped for other stablecoins to provide liquidity on other pairs.
The Maker community would be excited to have Uniswap as a customer. Currently Maker supports a similar treasury vault from the Yearn protocol, and it’s exciting to see more of these protocol-to-protocol partnerships develop.